Devoted Druid

{T}: Add {G}.
Put a -1/-1 counter on this creature: Untap this creature.

Cathars' Crusade

Whenever a creature you control enters, put a +1/+1 counter on each creature you control.

Falco Spara, Pactweaver

Flying, trample
Falco Spara enters with a shield counter on it.
You may look at the top card of your library any time.
You may cast spells from the top of your library by removing a counter from a creature you control in addition to paying their other costs.

Arcane Signet

{T}: Add one mana of any color in your commander's color identity.

Sol Ring

Birds of Paradise

Brokers Ascendancy

At the beginning of your end step, put a +1/+1 counter on each creature you control and a loyalty counter on each planeswalker you control.